Reduce Wikidata author vcard to creator part

Wikidata templates dump a vcard with too much data
in the artist field. When that format is found, TemplateParser
reduces it to meaningful information.

Change-Id: Id646261cf7b7516512a722af44f7f53da1e52005
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/202
Merge "Reduce Wikidata author vcard to creator part"